Seeing Blurryily. Seeing Blurrily

No period needed here in the title. Alternative since "blurrily" is a word that's awkward to pronounce and would mostly be avoided: Blurry Vision

My vision has always been godod, but until a whilelately it has been blurryly with the characteres, specifically when looking at text ofn the computer. My vision has always been good, but lately it has been blurry, specifically when looking at text on the computer.

My vision always been godod, but until a whilerecently it has been blurryly with the charactere when I look at words ofn the computer. My vision always been good, but recently it has been blurry when I look at words on the computer.

"good" instead of "god" When you say characters, I assume you mean text, as in the letters on your screen. That makes sense, but saying "words" or "text" might be a bit clearer

I work within programming, so I believe thate fact ofthat I spend all day looking for screens of computer,at computer screens and manipulating variables can cause me to lose my vision canor may be harming my vision. I work in programming, so I believe the fact that I spend all day looking at computer screens and manipulating variables can cause me to lose my vision or may be harming my vision.

Looking for = searching for

I work with programming, so I believe that fact of I spending all day looking for screens of computer, manipulating variables can lose my vision can beat a computer screen is what is harming my vision. I work with programming, so I believe that spending all day looking at a computer screen is what is harming my vision.

Could also be written as "I am a programmer, so I spend all day looking at a computer screen. I believe this is what is might be harming my vision." I just edited it to be more clear, but the original sentence will still be understood.

I Pprobably i need (to wear) glasses. I probably need (to wear) glasses.

The part in parentheses is optional

I Pprobably i need to wear glasses. I probably need to wear glasses.

"probably" isn't the beginning of the sentence, so it doesn't need to be capitalised. When using "I" as a pronoun, it should be capitalised.